What's your great white whale/ Grail?

What is the piece you covet the most Ans would give up a great deal for? Mine would have to be the Gen 1 m frame in clear with blue iridium. When I think of Oakley this is what I think of and remember. It is something I will probably never find and if I do will most likely be unreachable.

All the X Metals, specifically the Romeo 1 and specifically 2 or 3 Romeo's. So as I have all of that as of this week, I guess mission accomplished. Which means I'm waiting for something new and exciting (yes, I'm talking to you Oakley).

They're ordered in the order they'd be. First is the ott. When I get that, the next grail is a R1. Every piece I get just creates a want for a different piece. It's not like I'd stop if I got them all either. Neither would anyone on here.